代码不验证，可能不正确的标记？答案

【问题标题】：Code not validating, possible incorrect markup?代码不验证，可能不正确的标记？
【发布时间】：2014-08-06 19:56:56
【问题描述】：

我无法使用 W3C 验证此代码，文档类型为 <!doctype html>，据我所知，这是 HTML5 文档类型。

     <?php 
   echo "<img src='uploads/picture01.jpg?".filemtime ('uploads/picture01.jpg')."' class='img' alt='Bass Clef Photography Demo Picture One'/>";
   echo "<img src='uploads/picture02.jpg?".filemtime ('uploads/picture02.jpg')."' class='img' alt='Bass Clef Photography Demo Picture Two'/>";
   echo "<img src='uploads/picture03.jpg?".filemtime ('uploads/picture03.jpg')."' class='img' alt='Bass Clef Photography Demo Picture Three'/>";
   echo "<img src='uploads/picture04.jpg?".filemtime ('uploads/picture04.jpg')."' class='img' alt='Bass Clef Photography Demo Picture Four'/>";
   echo "<img src='uploads/picture05.jpg?".filemtime ('uploads/picture05.jpg')."' class='img' alt='Bass Clef Photography Demo Picture Five'/>";
   echo "<img src='uploads/picture06.jpg?".filemtime ('uploads/picture06.jpg')."' class='img' alt='Bass Clef Photography Demo Picture Six'/>";
   echo "<img src='uploads/picture07.jpg?".filemtime ('uploads/picture07.jpg')."' class='img' alt='Bass Clef Photography Demo Picture Seven'/>";
   echo "<img src='uploads/picture08.jpg?".filemtime ('uploads/picture08.jpg')."' class='img' alt='Bass Clef Photography Demo Picture Eight'/>";

   ?>

我得到的每一行的错误是；

生成的代码，

<img src='uploads/picture01.jpg?1405031988' class='img' alt='Bass Clef Photography Demo Picture One'/>
<img src='uploads/picture02.jpg?1397567043' class='img' alt='Bass Clef Photography Demo Picture Two'/>
<img src='uploads/picture03.jpg?1397567043' class='img' alt='Bass Clef Photography Demo Picture Three'/>
<img src='uploads/picture04.jpg?1397567043' class='img' alt='Bass Clef Photography Demo Picture Four'/>
<img src='uploads/picture05.jpg?1397567043' class='img' alt='Bass Clef Photography Demo Picture Five'/>
<img src='uploads/picture06.jpg?1397567043' class='img' alt='Bass Clef Photography Demo Picture Six'/>
<img src='uploads/picture07.jpg?1397567043' class='img' alt='Bass Clef Photography Demo Picture Seven'/>
<img src='uploads/picture08.jpg?1397567043' class='img' alt='Bass Clef Photography Demo Picture Eight'/>

注意。我已将文件时间附加到每个图像以停止图像的浏览器缓存。

【问题讨论】：

标签： php html validation w3c-validation

【解决方案1】：

您在图片名称后缺少结束 '：

<?php 
   echo "<img src='uploads/picture01.jpg?" .filemtime ('uploads/picture01.jpg') . "' class='img' alt='Bass Clef Photography Demo Picture One'/>";
   echo "<img src='uploads/picture02.jpg?" .filemtime ('uploads/picture02.jpg') . "' class='img' alt='Bass Clef Photography Demo Picture Two'/>";
   echo "<img src='uploads/picture03.jpg?" .filemtime ('uploads/picture03.jpg') . "' class='img' alt='Bass Clef Photography Demo Picture Three'/>";
   echo "<img src='uploads/picture04.jpg?" .filemtime ('uploads/picture04.jpg') . "' class='img' alt='Bass Clef Photography Demo Picture Four'/>";
   echo "<img src='uploads/picture05.jpg?" .filemtime ('uploads/picture05.jpg') . "' class='img' alt='Bass Clef Photography Demo Picture Five'/>";
   echo "<img src='uploads/picture06.jpg?" .filemtime ('uploads/picture06.jpg') . "' class='img' alt='Bass Clef Photography Demo Picture Six'/>";
   echo "<img src='uploads/picture07.jpg?" .filemtime ('uploads/picture07.jpg') . "' class='img' alt='Bass Clef Photography Demo Picture Seven'/>";
   echo "<img src='uploads/picture08.jpg?" .filemtime ('uploads/picture08.jpg') . "' class='img' alt='Bass Clef Photography Demo Picture Eight'/>";

   ?>

编辑：交换双引号和单引号

<?php 
   echo '<img src="uploads/picture01.jpg?' .filemtime ('uploads/picture01.jpg') . '" class="img" alt="Bass Clef Photography Demo Picture One" />';
   echo '<img src="uploads/picture02.jpg?' .filemtime ('uploads/picture02.jpg') . '" class="img" alt="Bass Clef Photography Demo Picture Two" />';
   echo '<img src="uploads/picture03.jpg?' .filemtime ('uploads/picture03.jpg') . '" class="img" alt="Bass Clef Photography Demo Picture Three" />';
   echo '<img src="uploads/picture04.jpg?' .filemtime ('uploads/picture04.jpg') . '" class="img" alt="Bass Clef Photography Demo Picture Four" />';
   echo '<img src="uploads/picture05.jpg?' .filemtime ('uploads/picture05.jpg') . '" class="img" alt="Bass Clef Photography Demo Picture Five" />';
   echo '<img src="uploads/picture06.jpg?' .filemtime ('uploads/picture06.jpg') . '" class="img" alt="Bass Clef Photography Demo Picture Six" />';
   echo '<img src="uploads/picture07.jpg?' .filemtime ('uploads/picture07.jpg') . '" class="img" alt="Bass Clef Photography Demo Picture Seven" />';
   echo '<img src="uploads/picture08.jpg?' .filemtime ('uploads/picture08.jpg') . '" class="img" alt="Bass Clef Photography Demo Picture Eight" />';

   ?>

【讨论】：

谢谢，在服务器端渲染后查看页面时，确实可以正确显示标记，但错误仍然存在。
我已按照您的建议使用新标记和新错误消息修改了问题。
你能把生成的 HTML 也贴一下吗？
您确定这些错误来自该代码吗？我没有看到它在那里谈论的任何错误。
我认为通过 HTML5 规范，您可以互换使用它们。也许验证者知道我们不知道的事情？

【解决方案2】：

W3C Markup Validation Service 检查文档是否使用有效的 HTML。

您收到错误是因为您尝试验证包含 PHP 的文档：验证器尝试将其解释为 HTML。

解决方案：验证生成的文档（在 PHP 运行之后）。你会看到你的 sn-p 是有效的 HTML5。

【讨论】：